Like most American automobile manufacturers, Pontiac relied on the straight-6 design for their circa-World War II automobiles.
1930s
In the 1930s, Pontiac introduced their "multi-cylinder" engine, the 208 in³ (3.4 L) straight-6.
208
The 208 in³ (3.4 L) 208 straight-6 was produced in 1935 and 1936. It was a side-valve design with a timing chain, as was popular at the time.
Pontiac/GMC
Just as was done with their later V8s, Pontiac shared their mainstream straight-6 engine with GMC for truck use. It was also a side-valve engine, and used a timing chain. Pontiac used this engine from 1937 through 1954, while GMC only used their 223 in 1938.
222
The 222 in³ (3.6 L) straight-6 was only used in Pontiac automobiles.
223
The 223 in³ (3.7 L) straight-6 was only used in GMC trucks.
239
The 239 in³ (3.9 L) straight-6 was only used in Pontiac automobiles.
215 OHV
In the mid-1960s, Pontiac revived their straight-6 for a short time. Although it was of a different displacement, this Pontiac engine was based on Chevrolet's Generation 3 straight-6.
215
The 215 in³ (3.5 L) straight-6 was produced in 1964 and 1965. It is sometimes confused with the 215 aluminum V8 used in the two years prior. It was an OHV/pushrod engine design, quite different from the previous Pontiac straight-6 engines.
1960s OHV
Another OHV straight-6 design was adopted by Pontiac the year after the 215. This was actually a rebadged Chevrolet Straight-6 for the Pontiac Firebird. This version was produced from 1966 through 1969.
230
230 in³ (3.8 L) 230 - See Chevrolet 230.
250
250 in³ (4.1 L) 250 - See Chevrolet 250.
See also
